"Among air experts, it's an open secret: federal and state officials grossly undercount a crucial type of air pollution, often by an order of magnitude and particularly in areas like Houston with its major concentrations of petrochemical plants."

"'Leave only footprints' may be the outdoor industry ethos, but Greenpeace says a study it recently conducted revealed troubling indications that the apparel made for outdoor recreation contains persistent chemicals, some of which are linked to negative health effects in both humans and animals."

"Salty bromide concentrations in the Monongahela River, which had risen in 2009 and 2010 due, at least in part, to discharges of Marcellus Shale gas drilling wastewater by sewage treatment plants, returned to normal levels in 2011 and this year, according to a Carnegie Mellon University river monitoring study."

"PHILADELPHIA -- Pennsylvania officials reported incomplete test results that omitted data on some toxic metals that were found in drinking water taken from a private well near a natural gas drilling site, according to legal documents released this week."

"TEXAS CITY — A fire at BP's Texas City refinery sent a large plume of black smoke over the industrial sector of the city. The fire broke out at about 1:30 p.m. and was out by 3:05 p.m., BP officials said."

"SANTA TERESA, N.M. -- An unknown hazardous material sickened about 200 people Tuesday just northwest of El Paso, Texas, as some workers in the industrial area where the substance released described feeling a burning sensation on their skin, according to New Mexico authorities."

"Today, OMB Watch and 16 local, regional, and national organizations filed a petition under the Toxics Release Inventory (TRI), calling on the U.S. Environmental Protection Agency (EPA) to require the oil and gas industry – including companies engaged in fracking – to report their toxic emissions. Such reporting would provide EPA with more information on the identity, use, and quantity of chemicals used by the oil and gas industry and would help the agency evaluate their health and environmental risks."

"BEIJING — A week of protests against the planned expansion of a petrochemical plant in the port city of Ningbo turned violent on Friday and Saturday when demonstrators attacked police cars and tossed bricks and water bottles at officers, according to accounts from participants posted on the Internet."

"Set aside the science lessons. The fight over fluoride is as much or more a clash of philosophy."

"In an effort to block a ballot measure in California that would require the labeling of genetically modified foods, shape a Senate race in Ohio with potential repercussions for fracking, and influence a host of House contests key to toxic chemical reform -- the chemical industry has been busy wielding its wallet, say environmental advocates."

"Researchers say that some chemicals have unexpected and potent effects at very low doses — but regulators aren't convinced."

"Pesticides used in farming are also killing worker bumblebees and damaging their ability to gather food, meaning colonies that are vital for plant pollination are more likely to fail when they are used, a study showed on Sunday."

"Hair stylist Natalija Josimov combed the straightening solution through her client's hair. She snapped on the blow dryer, and a plume of white vapor wrapped them in a toxic cloud."

"Hundreds of Peruvian farm workers, the majority of them women, became sick after inhaling a pesticide sprayed on a nearby field, the state-run Andina news agency reported."

"LOS ANGELES — Federal regulators failed to pursue recalls after they found cadmium-tainted jewelry on store shelves, despite their vow to keep the toxic trinkets out of children's hands, an Associated Press investigation shows."